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What is the material that is added to iron to create steel?

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In order to create steel from iron, first, the material is heated up and melted in a furnace. There, any impurities are removed from the material. Then, carbon is added to create steel.
Jonny Gios/Unsplash
Jonny Gios/Unsplash
What is the material that is added to iron to create steel?
- Carbon
- Copper
- Zinc
- Sodium
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